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| Re: A new topic for discussion, electrification to Port Jeff and Patchague (1515925) | |||
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Re: A new topic for discussion, electrification to Port Jeff and Patchague |
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Posted by WillD on Sun Jun 16 10:41:57 2019, in response to Re: A new topic for discussion, electrification to Port Jeff and Patchague, posted by Steamdriven on Sun Jun 16 07:22:47 2019. By the way, is there any good reason why EMUs can't have, say, a quarter mile (gap crossing) or 15 mile (territory extension) self-powered capacity?Mostly weight. Batteries are heavy. But the LIRR is going to order old school overweight pigs, so the additional weight may not really matter. The nice thing about BEMUs is that they can charge on the fly, allowing the battery to be fully topped up when it reaches the end of the electrified territory. Short sections of electrification, say a couple miles on either side of a station, can greatly reduce the traction load on that battery by allowing the train to use commercial power to get up to speed. Of course 3rd rail is already hard pressed to supply the traction needs of an accelerating train, and again it'd probably be better to go with something that reduces transmitted current. |
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